[GasBurnlife(landapanda)]

Originally Posted by AlpsRider

I guess you could say that. I haven't seen anything disturbing about the S55 from the M3/M4 forums. The exact same S55 engine has been reliable in those cars since 2014. They have reduced the incidence of spun crank hub as well. Most of them happened to modded cars that have the DCT. Many of them had aggressive shifting software flashed on their DCTs as well as a tune. Now if you are talking about 10 years and 180k miles of wear and tear then yeah there are more hoses to replace. The N55 and S55 are both complex turbo engines and both have long term maintenance risks.

I have almost 90k miles on my N55 engine in my 535 with zero issues.

[GoneIn4Secs]

Originally Posted by .2pdk

I believe spun bearings or some such thing...he works at Budds's in Oakville, head tech.

I think I know that guy,

[F87_LCI]

Originally Posted by GoneIn4Secs

I think I know that guy,

Brent?

[sharpst77]

Originally Posted by nioh_lbbm2

On the 2 series forum quite a few posts about coolant hose breaking around 50-55k miles. I would preemptively change that

Might have to pick a few of those hoses up and store them in the trunk.

[.2pdk]

Originally Posted by F87_LCI

Brent?

Yes.

[akkando]

Originally Posted by .2pdk

I believe spun bearings or some such thing...he works at Budds's in Oakville, head tech.

Sure he isn't thinking S65......?

[m2for2]

Originally Posted by M-Supra

2018 M2 DCT 52K HARD miles, 35K+ on BM3 Race Gas Tune, 15K+ with Dinan Turbo

ZERO issues, all maintenance done by me except for the free oil changes, I beat the ever living snot out of her daily.

The hero we deserve.

[.2pdk]

Originally Posted by akkando

Sure he isn't thinking S65......?

Nope...N55 he was very specific.

[m2for2]

Originally Posted by PackPride85

If you're buying a German car chances are reliability isn't #1 on your list.

[KevM2]

Originally Posted by .2pdk

Yup, had a 1M up until last year, 35k on it and bulletproof.

It was just that my tech guy at BMW told me this morning he has now seen 3 N55 come in over the last 4 months due to seizing.

Older models, 2011 and 2013 I believe...

I was told the same exact thing by my tech! Apparently the seizing here this winter was caused by people driving short distances so there was too much water condensation in the engine oil and it froze solid

[M-Supra]

Originally Posted by .2pdk

Agreed, guess I'm too early as the documented cases are older models.

However, isn't the N55 in the M2s the same as in the previous 3/4 models, just tuned differently?

Same pistons and rods as S55 IIRC

[M-Supra]

Originally Posted by m2for2

The hero we deserve.

Thanks for the kind words, no hero, I just play one in my car

Halim just built a custom "Stage 3" tune for her, 18.5psi top of 5th gear...completely stock fuel system

http://www.bootmod3.net/log?id=5c758ff3c090c609408878e4

[.2pdk]

Weather just provided me a window to take her out for a spin.

Man I love this car, too much fun.

Decisions, decisions...I'm not sure I would ever use/need what the M2C offers given the good deals on OG m2s right now.

[GoneIn4Secs]

Originally Posted by F87_LCI

Brent?

Yup thats the guy

[GoneIn4Secs]

Originally Posted by KevM2

I was told the same exact thing by my tech! Apparently the seizing here this winter was caused by people driving short distances so there was too much water condensation in the engine oil and it froze solid

Yes see my thread in canada forum about starting the car up during cold ass days

Shit like this is the reason it might be a good idea, plus i keep my car in a garage so that also factors in too

[KevM2]

Originally Posted by GoneIn4Secs

Yes see my thread in canada forum about starting the car up during cold ass days

Shit like this is the reason it might be a good idea, plus i keep my car in a garage so that also factors in too

Yup I'm in Canada too and also keep her in the garage.. think an oil pan warmer would be useful for parking outside? Maybe better than nothing

[heavyD^2]

Originally Posted by M-Supra

Same pistons and rods as S55 IIRC

I believe the M2 version also has additional oil baffles that regular N55 engines don't get.

[heavyD^2]

Originally Posted by PackPride85

If you're buying a German car chances are reliability isn't #1 on your list.

Except when facts prove otherwise;

https://www.jdpower.com/business/pre...ility-studyvds

Times have changed. Hondas for example are junk. Their reliability has been dropping for years. Despite being the last automaker to utilize DI and FI they still couldn't get it right. I can't believe in this day and age you could design an engine that has such poor tolerances that that the oil crankcase actually fills up via dilution. This is the kind of stuff we would have expected from Hyundai decades ago;

https://www.wardsauto.com/engines/ho...lution-problem

[.2pdk]

Originally Posted by heavyD^2

Except when facts prove otherwise;

Times have changed. Hondas for example are junk. Their reliability has been dropping for years. I can't believe in this day and age you could design an engine that has such poor tolerances that that the oil crankcase actually fills up via dilution. This is the kind of stuff we would have expected from Hyundai decades ago;

Yeah Honda really screwed the pooch on that one...

[XutvJet]

The N55 in the M2 is the same open deck block as all other N55s. It's plenty strong. The N55 in the M235 and M2 have a stronger forged crank and cylinder oil squiters. All 2014+ N55s use the S55 rod bearings and rods. The M2 N55 has a more race focused oil pan baffle.

Barring some of the earlier pre 2014 N55s with rod bearing issues, the N55 is a pretty dang reliable motor. The motor is generally simple compared to the N54, B58, and S55, easy to work on, and relatively cheap in terms of parts.

The common issues are leaks from the oil filter housing gasket and valve cover gasket and the coolant line from the radiator to expansion tank. Water pump and coil packs will likely need replacement at 70+k mileage.

The N55 in the M2 is a factory pumped up motor and doesn't have the "M" expense. To me, that's perfect for most people. It's plenty powerful and faster and quicker than 99% of the cars on the road.

[M2driverWV]

Originally Posted by XutvJet

The N55 in the M2 is the same open deck block as all other N55s. It's plenty strong. The N55 in the M235 and M2 have a stronger forged crank and cylinder oil squiters. All 2014+ N55s use the S55 rod bearings and rods. The M2 N55 has a more race focused oil pan baffle.

Barring some of the earlier pre 2014 N55s with rod bearing issues, the N55 is a pretty dang reliable motor. The motor is generally simple compared to the N54, B58, and S55, easy to work on, and relatively cheap in terms of parts.

The common issues are leaks from the oil filter housing gasket and valve cover gasket and the coolant line from the radiator to expansion tank. Water pump and coil packs will likely need replacement at 70+k mileage.

The N55 in the M2 is a factory pumped up motor and doesn't have the "M" expense. To me, that's perfect for most people. It's plenty powerful and faster and quicker than 99% of the cars on the road.

That's exactly why I went for the LCI. I keep cars long after warranty expires and wrench on everything I own. I knew the N55 would be much cheaper in the long game on ownership with me doing all the work.

[.2pdk]

Originally Posted by XutvJet

The N55 in the M2 is the same open deck block as all other N55s. It's plenty strong. The N55 in the M235 and M2 have a stronger forged crank and cylinder oil squiters. All 2014+ N55s use the S55 rod bearings and rods. The M2 N55 has a more race focused oil pan baffle.

Barring some of the earlier pre 2014 N55s with rod bearing issues, the N55 is a pretty dang reliable motor. The motor is generally simple compared to the N54, B58, and S55, easy to work on, and relatively cheap in terms of parts.

The common issues are leaks from the oil filter housing gasket and valve cover gasket and the coolant line from the radiator to expansion tank. Water pump and coil packs will likely need replacement at 70+k mileage.

The N55 in the M2 is a factory pumped up motor and doesn't have the "M" expense. To me, that's perfect for most people. It's plenty powerful and faster and quicker than 99% of the cars on the road.

Awesome write up, thanks.